<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        #container{
            text-align: center;
            margin-left: 40%;
            margin-top: 20%;
            padding-top: 4%;
            border-style: solid;
            border-width: 1px;
            width: 200px;
            height: 50px;
        }
    </style>
</head>
<body>
    <div id="container">
        <a href="logIn.html"><input type="button" value="登陆"/></a>
        <a href="addStudent.html"><input type="button" value="添加学生"/></a>
    </div>
</body>
</html>